/* ===== STM Meridian — teal medical, multi-layer ===== */
:root{
  --bg:#eef7f6; --card:#ffffff; --teal:#0e7c7b; --teal-dk:#0a4a4a; --teal-lt:#12b5a5;
  --mint:#d7efea; --ink:#123332; --ink2:#4d6b68; --line:rgba(14,124,123,.16);
  --amber:#f4a259; --danger:#e2555c;
  --ds:'Fraunces',Georgia,serif; --sb:'Inter',-apple-system,'Segoe UI',sans-serif;
}
*{box-sizing:border-box}
body.sm-body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sb);font-size:16px;line-height:1.6}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--ds);line-height:1.16;margin:0 0 .4em}

/* top bar */
.sm-top{background:var(--teal-dk);position:sticky;top:0;z-index:60;box-shadow:0 2px 14px rgba(10,74,74,.25)}
.sm-top-in{display:flex;align-items:center;gap:18px;padding:12px 22px}
.sm-brand{display:flex;align-items:center;gap:10px;color:#fff}
.sm-brand-ic{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--teal-lt),var(--teal));display:flex;align-items:center;justify-content:center;color:#fff;flex:0 0 auto}
.sm-brand-tx{font-family:var(--ds);font-weight:800;font-size:19px;line-height:1.1;display:flex;flex-direction:column}
.sm-brand-tx small{font-family:var(--sb);font-weight:500;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;opacity:.75}
.sm-nav{flex:1;overflow-x:auto;scrollbar-width:none}
.sm-nav::-webkit-scrollbar{display:none}
ul.sm-menu{display:flex;gap:2px;list-style:none;margin:0;padding:0}
ul.sm-menu li{flex:0 0 auto}
ul.sm-menu a{display:block;padding:9px 13px;border-radius:9px;color:#cfe8e3;font-weight:600;font-size:14px}
ul.sm-menu a:hover{background:rgba(255,255,255,.12);color:#fff}
.sm-cta{background:var(--amber);color:#3a2410;font-weight:800;font-size:14px;padding:10px 18px;border-radius:11px;flex:0 0 auto;box-shadow:0 3px 0 #c77f3c}
.sm-cta:hover{transform:translateY(-1px)}

/* hero */
.sm-hero{background:linear-gradient(160deg,var(--teal-dk) 0%,#0d5f5e 55%,#0e7c7b 100%);color:#fff;padding:56px 0 64px;position:relative;overflow:hidden}
.sm-hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(18,181,165,.35),transparent 70%)}
.sm-hero-in{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;position:relative;z-index:1}
.sm-pill{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);padding:6px 14px;border-radius:99px;font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px}
.sm-hero h1{font-size:clamp(28px,3.6vw,44px);font-weight:800}
.sm-hero h1 em{color:#8fe3d2;font-style:normal;border-bottom:3px solid var(--amber)}
.sm-hero p{font-size:17px;color:#d5ebe6;max-width:56ch}
.sm-hero-acts{display:flex;gap:12px;margin:20px 0 26px;flex-wrap:wrap}
.sm-btn{background:var(--amber);color:#3a2410;font-weight:800;padding:13px 24px;border-radius:12px;box-shadow:0 4px 0 #c77f3c}
.sm-btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45);box-shadow:none}
.sm-btn-ghost:hover{background:rgba(255,255,255,.12)}
.sm-hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;border-top:1px solid rgba(255,255,255,.2);padding-top:18px}
.sm-hero-stats div{display:flex;flex-direction:column}
.sm-hero-stats b{font-family:var(--ds);font-size:24px;color:#8fe3d2}
.sm-hero-stats span{font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;opacity:.8}
.sm-hero-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);backdrop-filter:blur(8px);border-radius:18px;padding:22px 24px}
.sm-hero-card h4{font-size:17px;color:#8fe3d2;letter-spacing:.02em}
.sm-check{list-style:none;margin:0 0 16px;padding:0;font-size:14px}
.sm-check li{padding:7px 0;border-bottom:1px dashed rgba(255,255,255,.2)}
.sm-check b{color:#ffd9a8;margin-right:6px}
.sm-feat-k{display:block;font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;opacity:.75;margin-bottom:4px}
.sm-hero-feat a{font-weight:700;font-size:15px;line-height:1.4}
.sm-hero-feat a:hover{color:#ffd9a8}

/* benefits */
.sm-ben{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:-34px;position:relative;z-index:2}
.sm-ben-item{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:0 8px 22px rgba(10,74,74,.1)}
.sm-ben-item i{font-style:normal;font-size:26px}
.sm-ben-item b{display:block;font-size:15.5px;margin:6px 0 4px}
.sm-ben-item span{font-size:13.5px;color:var(--ink2)}

/* bands */
.sm-band{margin-top:44px}
.sm-band-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.sm-band-head h2{font-size:24px;display:flex;align-items:center;gap:12px}
.sm-band-no{font-family:var(--sb);font-size:12px;font-weight:800;background:var(--teal);color:#fff;border-radius:8px;padding:5px 9px}
.sm-band-more{font-size:13.5px;font-weight:700;color:var(--teal)}
.sm-band-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.sm-card{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:transform .18s,box-shadow .18s}
.sm-card:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(10,74,74,.14)}
.sm-card-media{display:block;background:var(--mint)}
.sm-card-media img,.sm-card-media .sm-ph{width:100%;aspect-ratio:16/9;object-fit:cover}
.sm-ph{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--teal);padding:18px;aspect-ratio:16/9}
.sm-ph i{font-style:normal;font-size:12.5px;color:var(--ink2);text-align:center}
.sm-ph-img{width:100%;height:auto}
.sm-card-b{padding:15px 17px 13px}
.sm-card-b h3{font-size:16.5px;margin:0 0 6px}
.sm-card-b h3 a:hover{color:var(--teal)}
.sm-card-b p{margin:0 0 8px;font-size:13.5px;color:var(--ink2)}
.sm-meta{font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:#8aa8a3}

/* tiers */
.sm-tiers{background:linear-gradient(180deg,#e2f1ee,var(--bg));padding:46px 0;margin-top:48px}
.sm-sec-h{font-size:26px;margin-bottom:22px}
.sm-tier-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.sm-tier{background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:22px;position:relative}
.sm-tier-hot{border-color:var(--teal);box-shadow:0 14px 30px rgba(14,124,123,.18);transform:translateY(-8px)}
.sm-tier-tag{position:absolute;top:-13px;left:20px;background:var(--teal);color:#fff;font-size:11px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;padding:5px 12px;border-radius:99px}
.sm-tier-hot .sm-tier-tag{background:var(--amber);color:#3a2410}
.sm-tier h3{font-size:19px}
.sm-tier ul{list-style:none;margin:0 0 10px;padding:0;font-size:14.5px}
.sm-tier li{padding:6px 0;border-bottom:1px dashed var(--line)}
.sm-tier-note{font-size:12.5px;color:var(--ink2);font-style:italic;margin:0}

/* stream */
.sm-stream{margin-top:46px}
.sm-stream-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 34px}
.sm-row{display:grid;grid-template-columns:88px 1fr;gap:14px;padding:12px 0;border-bottom:1px solid var(--line);align-items:center}
.sm-row-media{display:block;background:var(--mint);border-radius:12px;overflow:hidden}
.sm-row-media img,.sm-row-media .sm-ph{width:88px;height:64px;object-fit:cover;aspect-ratio:4/3}
.sm-row-cat{font-size:10.5px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--teal)}
.sm-row h3{font-size:15px;margin:2px 0 4px}
.sm-row h3 a:hover{color:var(--teal)}

/* faq */
.sm-faq{margin:46px auto 60px;max-width:860px}
.sm-faq details{background:var(--card);border:1px solid var(--line);border-radius:13px;margin-bottom:10px;overflow:hidden}
.sm-faq summary{cursor:pointer;padding:16px 20px;font-weight:700;font-size:15.5px;list-style:none;position:relative}
.sm-faq summary::-webkit-details-marker{display:none}
.sm-faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--teal)}
.sm-faq details[open] summary::after{content:"–"}
.sm-faq details[open]{border-color:var(--teal)}
.sm-faq details p{padding:0 20px 16px;margin:0;color:var(--ink2);font-size:14.5px}

/* archive / single */
.sm-page{max-width:1180px;margin:0 auto;padding:30px 22px}
.sm-page-h{font-size:clamp(24px,3vw,34px)}
.sm-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.sm-article{max-width:800px;margin:0 auto;padding:30px 22px}
.sm-art{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:30px 34px}
.sm-art h1{font-size:clamp(25px,3vw,36px)}
.sm-art-meta{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink2);margin-bottom:18px}
.sm-content{font-size:16.5px;line-height:1.75}
.sm-content h2{font-size:22px;margin:28px 0 10px;color:var(--teal-dk)}
.sm-content table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.sm-content th{background:var(--teal);color:#fff;text-align:left;padding:9px 12px;font-size:12px;letter-spacing:.06em;text-transform:uppercase}
.sm-content td{border:1px solid var(--line);padding:9px 12px}
.sm-content tr:nth-child(even) td{background:var(--mint)}
.sm-content blockquote{background:var(--mint);border-left:4px solid var(--teal);margin:18px 0;padding:12px 18px;border-radius:0 12px 12px 0}

/* footer */
.sm-foot{background:var(--teal-dk);color:#cfe8e3;margin-top:20px}
.sm-foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:28px;padding:40px 22px 20px}
.sm-brand-ft{margin-bottom:10px}
.sm-foot h5{color:#8fe3d2;font-size:12px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:12px}
.sm-foot ul{list-style:none;margin:0;padding:0;font-size:14px}
.sm-foot li{margin-bottom:8px}
.sm-foot a:hover{color:#fff}
.sm-foot-desc{font-size:13px;color:#9fc4bd;line-height:1.6}
.sm-foot-base{border-top:1px solid rgba(255,255,255,.15);padding:14px 22px;font-size:12.5px;color:#7fa8a1}

/* responsive */
@media (max-width:1000px){
  .sm-hero-in{grid-template-columns:1fr}
  .sm-ben{grid-template-columns:1fr 1fr}
  .sm-band-grid,.sm-grid{grid-template-columns:1fr 1fr}
  .sm-tier-row{grid-template-columns:1fr}
  .sm-tier-hot{transform:none}
  .sm-foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .sm-ben,.sm-band-grid,.sm-grid,.sm-stream-grid,.sm-hero-stats{grid-template-columns:1fr}
  .sm-hero-stats div{flex-direction:row;align-items:baseline;gap:8px}
  .sm-brand-tx small{display:none}
  .sm-cta{display:none}
  .sm-art{padding:22px 18px}
}